Speed-Pro File Fit Plasma Moly Piston Ring Set - 4.000" Bore (+.045") - Top Ring: 1/16", 2nd Ring: 1/16", Oil Ring: 3/16", Oil Tension Ring: Standard PD150K and other applications in which

and other applications in which clearance is limited

1 in Width

Mount To Bench Vise Or Permanently Mounted

Hurst Mastershift 3-Speed

Speed-Pro File Fit Plasma Moly Piston Ring Set - 4.000" Bore (+.045") - Top Ring: 1/16", 2nd Ring: 1/16", Oil Ring: 3/16", Oil Tension Ring: Standard PD150K and other applications in whichSpeed Pro designs and engineers pistons to meet the most demanding street performance and racing conditions. In combination, we draw upon more than 100 years of Speed Pro engine mastery to enhance the piston ring and its seal. Our Speed Pro brand is recognized for being a winner in every form of racing, and is the proven horsepower leader in oval track and drag racing. Hell Fire Rings: Speed Pro Hell Fire rings, manufactured from a specially hardened